Class SlewingPanel
- java.lang.Object
-
- org.orekit.forces.Panel
-
- org.orekit.forces.SlewingPanel
-
public class SlewingPanel extends Panel
Class representing one panel of a satellite, slewing about an axis at constant rate.It is mainly used to represent a solar array with fixed rate rotation.
The panel rotation evolves linearly according to a start position and an angular rate (which can be set to 0 for non-rotating panels, which may occur in special modes or during contingencies).
These panels are considered to be always
double-sided
.- Since:
- 3.0
- Author:
- Luc Maisonobe
-
-
Constructor Summary
Constructors Constructor Description SlewingPanel(Vector3D rotationAxis, double rotationRate, AbsoluteDate referenceDate, Vector3D referenceNormal, double area, double drag, double liftRatio, double absorption, double reflection)
Simple constructor.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description <T extends CalculusFieldElement<T>>
FieldVector3D<T>getNormal(FieldSpacecraftState<T> state)
Get panel normal in spacecraft frame.Vector3D
getNormal(SpacecraftState state)
Get panel normal in spacecraft frame.-
Methods inherited from class org.orekit.forces.Panel
getAbsorption, getArea, getDrag, getLiftRatio, getReflection, isDoubleSided
-
-
-
-
Constructor Detail
-
SlewingPanel
public SlewingPanel(Vector3D rotationAxis, double rotationRate, AbsoluteDate referenceDate, Vector3D referenceNormal, double area, double drag, double liftRatio, double absorption, double reflection)
Simple constructor.As the sum of absorption coefficient, specular reflection coefficient and diffuse reflection coefficient is exactly 1, only the first two coefficients are needed here, the third one is deduced from the other ones.
The panel is considered to rotate about one axis in order to make its normal point as close as possible to the target. It means the target will always be in the plane defined by the rotation axis and the panel normal.
- Parameters:
rotationAxis
- rotation axis of the panelrotationRate
- rotation rate of the panel (rad/s)referenceDate
- reference date for the panel rotationreferenceNormal
- direction of the panel normal at reference date in spacecraft framearea
- panel area in m²drag
- drag coefficientliftRatio
- drag lift ratio (proportion between 0 and 1 of atmosphere modecules that will experience specular reflection when hitting spacecraft instead of experiencing diffuse reflection, hence producing lift)absorption
- radiation pressure absorption coefficient (between 0 and 1)reflection
- radiation pressure specular reflection coefficient (between 0 and 1)
-
-
Method Detail
-
getNormal
public Vector3D getNormal(SpacecraftState state)
Get panel normal in spacecraft frame.
-
getNormal
public <T extends CalculusFieldElement<T>> FieldVector3D<T> getNormal(FieldSpacecraftState<T> state)
Get panel normal in spacecraft frame.
-
-